Aircraft



FIG. 1 is a top plan view of said aircraft;

FIG. 2 is an elevational view of one side thereof, the elevational view of the other side being substantially a mirror image;

FIG. 3 is an elevational view of the front thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is an elevational view of the rear thereof. 

The ornamental design for an aircraft, substantially as shown and described. 